18034588561 has 4 divisors (see below), whose sum is σ = 19674096624. Its totient is φ = 16395080500.

The previous prime is 18034588553. The next prime is 18034588589. The reversal of 18034588561 is 16588543081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18034588561 - 2³ = 18034588553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18034588501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819754015 + ... + 819754036.

It is an arithmetic number, because the mean of its divisors is an integer number (4918524156).

Almost surely, 2^18034588561 is an apocalyptic number.

18034588561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18034588561 is a deficient number, since it is larger than the sum of its proper divisors (1639508063).

18034588561 is a wasteful number, since it uses less digits than its factorization.

18034588561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639508062.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 18034588561 in words is "eighteen billion, thirty-four million, five hundred eighty-eight thousand, five hundred sixty-one".